Litter begets litter. Research has shown that one of the best ways to prevent litter is to remove litter immediately. Leaving litter on your lawn or around your business gives people the impression that no one cares and they will be more likely to litter. People are less likely to litter if the area is clean.
According to Keep America Beautiful research, 4% of the population is responsible for 81% of the intentional litter. Intentional litter happens when an individual litters with purpose-- a person throws a soda can in a planter downtown on purpose. Unintentional litter is litter that happens when individuals do not mean to litter--- a receipt is blown out of person's hand and they cannot retrieve it.